Half to william f



(No Model.)

B A BRANDENBURG TYPE BAR POR'TYPE WRITING MACHINES.

Patented Jan.21,1890.

MGxCQ N. PLIERS, PhnioLilhognpher. wahinglm. D. C.

UNITED STATES PATENT QFFICE.

EDXVARD A. BRANDENBURG, OF DES MOINES, IOWVA, ASSIGNOR OF ONE- HALF TO WVILLIAM F. CARSON, OF SAME PLACE.

TYPE-BAR FOR TYPE-WRITING MACHINES.

SPECIFICATION forming part of Letters Patent No. 420,005, dated January 21, 1890.

Application filed September 20, 1888- Serial No. 285,936. (No model.)

' ble at its pivoted end with a rigid hanger, as

hereinafter set forth, pointed out in my claims, and illustrated in the accompanying draw- I ings, in whichhanger and a section of a macl'iinc-frame as required for use.

a is a fiat steel bar, wider at its ends than its center, and bent double at its center.

I) is a perforated block fixed in the bend at the center in such a manner as toadapt the end of the arm for the reception of a type to be carried thereby.

c is a flat steel bar that has a perforated extension (Z -at its larger end that projects outward at an angle of about forty-five degrees. The small end is fixed to and between the central portion of the parallel parts of the double bar a by means of washers f and a rivet g.

h are steel pivots fixed to the ends of the parallel free ends of the bar a to project outward and into corresponding bearings formed in the inside faces of a type-arm hanger m as required to pivot the arm thereto.

m is an arch fixed to the ends of the hanger to make it rigid, as required, to prevent it from spreading.

a is a screw that extends through screwthreaded bores in one of the parallel parts and free ends of the bar CL and the bar 0 (Z in s is a rod that extends from the branch or extension (Z of the bar 0 to a lever in a common way, in such a manner that when the end of the lever is depressed the type-arm will be swung upward, as required, to make an impression with the type on its end upon paper folded over an impression plate or roller.

A light, strong, and durable type-arm is thus produced that can be readily attached to and detached from the hanger, and the pressure of its pivots in the bearings readily regulated, as required, to prevent any deflection of the arm in its operation, so that the alignment of the letters printed in succession by a series of the arms will not be faulty, as often occurs in typewriting when the pivots and bearings allow the arms to vibrate and deflect from the perpendicular planes in which they move to make impressions with the types carried on their free ends.

In place of bending one long bar double, two bars may be rigidly fixed together to produce my expansible type-arm.

I claim as my invention- 1. An arm for type-writers, composed of three bars that can be adjusted relatively to each other, and a screw for adjusting them, and pivots extending outward from the free ends of the two outer bars.

2. A type-arm comprising two parallel parts firmly united at one end and provided with pivots or fulcra at their opposite ends, a bar fixed between the central portions of the parallel parts and providedwith an extension constructed to be connected with a rod and lever, and a screw connected with the free end portions of the three parallel parts for regulating the spaeeibetween the pivots, in the manner set forth, for the purposes stated.

3. The type-arm consisting of the bar a, fixed block b, the bar 0, having an extension d, the Washers f,the rivet g, the pivots h, andthe screw n, in combination with a hanger m, substantially as shown and described, for the purposes stated.

EDWARD A. BRANDENBURG. Witnesses:

M. P. SMITH, THOMAS G. ORWIG. 

